Hacky way to page data with multiple cubes in a single extension

hacky.js

define(["jquery", 'qvangular'], function ($, qv) {
	return {
		initialProperties: {
			qHyperCubeDef: {
				qDimensions: [],
				qMeasures: [],
				qInitialDataFetch: [{
					qWidth: 2,
					qHeight: 1
				}]
			},
			secondcube: {
				qHyperCubeDef: {
					qDimensions: [{
						qDef: {
							qFieldDefs: ["zip"]
						}
					}],
					qMeasures: [{
						qDef: {
							qDef: '=Count(zip)'
						}
					}],
					qInitialDataFetch: [{
						qWidth: 2,
						qHeight: 5000
					}]
				}
			}
		},
		definition: {
			type: "items",
			component: "accordion",
			items: {
				dimensions: {
					uses: 'dimensions',
					min: 1,
					max: 1
				},
				measures: {
					uses: "measures",
					min: 1,
					max: 1
				}
			}
		},
		prePaint: function(layout) {
			
			var columns = layout.secondcube.qHyperCube.qSize.qcx;
			var totalheight = layout.secondcube.qHyperCube.qSize.qcy;		
			var pageheight = Math.floor(10000 / columns);
			var numberOfPages = Math.ceil(totalheight / pageheight);
						
			var pages = Array.apply(null, Array(numberOfPages)).map(function(data, index) {

				var msg = {
					"method":"GetHyperCubeData",
					"handle":this.backendApi.model.handle,
					"params":["/secondcube/qHyperCubeDef", 
						[{
							qTop: (pageheight * index) + index,
							qLeft: 0,
							qWidth: columns,
							qHeight: pageheight
						}]
					], 
					"jsonrpc":"2.0"
				}

				return this.backendApi.model.session.rpc(msg).then(function(d) { return d.result; });
				
			}, this);
			
			var Promise = qv.getService('$q');
			
			Promise.all(pages).then(function(data) {
				var data = data.reduce(function(a,b) { return a.concat(b.qDataPages[0].qMatrix); },[])
				this.$scope.ext.paint.call(this, this.$element, layout, data);
			}.bind(this))

		},
		paint: function (element, layout, data) {
			if (!data) return;
		}
	};
});

this.backendApi.model.session.rpc is no longer supported. Do you have an alternate "hacky method" for paging data in Qlik Sense November 2017?